Library / Nuts, seeds & snacks
A kind of corn · also called popped corn, popped popcorn

3 views: its portrait, and how it looks in the comparison photos.
About
Popcorn is a puffed corn snack that takes up substantial space while remaining exceptionally lightweight.
Popcorn is among the least dense foods you can eat because it consists mostly of trapped air held inside thin walls of expanded starch. With a bulk density of 0.25 ounces per cup (0.03 g/mL), it is far lighter than other dry snacks like potato chips or pretzels. A large movie-theater tub holding 16 cups of popped corn contains only about 4 ounces (113 g) of actual food. This dramatic expansion allows a tiny handful of dense kernels to fill an entire serving bowl.
From Wikipedia
Popcorn is a variety of corn kernel which expands and puffs up when heated. The term also refers to the snack food produced by the expansion.
Read more on Wikipedia →Text from Wikipedia’s “Popcorn” article, CC BY-SA 4.0.
2 on the site
One cup weighs
0.25 oz (7.1 g)
Quick answer
One US cup of popped popcorn weighs only about 0.25 ounces (7 g), reflecting a typical bulk density of 0.25 ounces per cup (0.03 g/mL). This means an entire cup of popcorn weighs about the same as three pennies.
Typical figures, the same ones every comparison on the site uses; real ones vary.
More like popped popcorn
Compare it
Next to anything: a person, a car, another corn.